Subtract 21/80 from 14/70
14/70 - 21/80 is -1/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
14/70 = 14 × 8/70 × 8 = 112/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560 - Subtract the two like fractions:
112/560 - 147/560 = 112 - 147/560 = -35/560 - After reducing the fraction, the answer is -1/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/70-21/80 14/70-42/80 42/70-21/80 14/70-63/80 98/70-21/80